<<< native
[ EText TextNormal "Here's a display\160"
, EGrouped
    [ EGrouped
        [ EIdentifier "F"
        , ESymbol Ord "\8289"
        , EDelimited
            "("
            ")"
            [ Right
                (EGrouped [ EIdentifier "t" , ESymbol Pun "," , EIdentifier "y" ])
            ]
        ]
    , ESymbol Rel "="
    , EFraction
        NormalFrac
        (EDelimited
           "("
           ")"
           [ Right
               (EGrouped
                  [ ENumber "1"
                  , ESymbol Pun ","
                  , EFraction
                      NormalFrac
                      (EGrouped [ ESymbol Ord "\8518" , EIdentifier "y" ])
                      (EGrouped [ ESymbol Ord "\8518" , EIdentifier "t" ])
                  ])
           ])
        (EDelimited
           ""
           ""
           [ Left "\8741"
           , Right
               (EDelimited
                  "("
                  ")"
                  [ Right
                      (EGrouped
                         [ ENumber "1"
                         , ESymbol Pun ","
                         , EFraction
                             NormalFrac
                             (EGrouped [ ESymbol Ord "\8518" , EIdentifier "y" ])
                             (EGrouped [ ESymbol Ord "\8518" , EIdentifier "t" ])
                         ])
                  ])
           , Left "\8741"
           ])
    ]
, EText TextNormal "\160with some real math in it."
]
>>> omml
<?xml version='1.0' ?>
<m:oMathPara>
  <m:oMathParaPr>
    <m:jc m:val="center" />
  </m:oMathParaPr>
  <m:oMath>
    <m:r>
      <m:rPr>
        <m:nor />
        <m:sty m:val="p" />
      </m:rPr>
      <m:t>Here&#39;s a display </m:t>
    </m:r>
    <m:r>
      <m:t>F</m:t>
    </m:r>
    <m:r>
      <m:rPr>
        <m:sty m:val="p" />
      </m:rPr>
      <m:t>&#8289;</m:t>
    </m:r>
    <m:d>
      <m:dPr>
        <m:begChr m:val="(" />
        <m:endChr m:val=")" />
        <m:sepChr m:val="" />
        <m:grow />
      </m:dPr>
      <m:e>
        <m:r>
          <m:t>t</m:t>
        </m:r>
        <m:r>
          <m:rPr>
            <m:sty m:val="p" />
          </m:rPr>
          <m:t>,</m:t>
        </m:r>
        <m:r>
          <m:t>y</m:t>
        </m:r>
      </m:e>
    </m:d>
    <m:r>
      <m:rPr>
        <m:sty m:val="p" />
      </m:rPr>
      <m:t>=</m:t>
    </m:r>
    <m:f>
      <m:fPr>
        <m:type m:val="bar" />
      </m:fPr>
      <m:num>
        <m:d>
          <m:dPr>
            <m:begChr m:val="(" />
            <m:endChr m:val=")" />
            <m:sepChr m:val="" />
            <m:grow />
          </m:dPr>
          <m:e>
            <m:r>
              <m:t>1</m:t>
            </m:r>
            <m:r>
              <m:rPr>
                <m:sty m:val="p" />
              </m:rPr>
              <m:t>,</m:t>
            </m:r>
            <m:f>
              <m:fPr>
                <m:type m:val="bar" />
              </m:fPr>
              <m:num>
                <m:r>
                  <m:rPr>
                    <m:sty m:val="p" />
                  </m:rPr>
                  <m:t>ⅆ</m:t>
                </m:r>
                <m:r>
                  <m:t>y</m:t>
                </m:r>
              </m:num>
              <m:den>
                <m:r>
                  <m:rPr>
                    <m:sty m:val="p" />
                  </m:rPr>
                  <m:t>ⅆ</m:t>
                </m:r>
                <m:r>
                  <m:t>t</m:t>
                </m:r>
              </m:den>
            </m:f>
          </m:e>
        </m:d>
      </m:num>
      <m:den>
        <m:d>
          <m:dPr>
            <m:begChr m:val="" />
            <m:endChr m:val="" />
            <m:sepChr m:val="∥" />
            <m:grow />
          </m:dPr>
          <m:e />
          <m:e>
            <m:d>
              <m:dPr>
                <m:begChr m:val="(" />
                <m:endChr m:val=")" />
                <m:sepChr m:val="" />
                <m:grow />
              </m:dPr>
              <m:e>
                <m:r>
                  <m:t>1</m:t>
                </m:r>
                <m:r>
                  <m:rPr>
                    <m:sty m:val="p" />
                  </m:rPr>
                  <m:t>,</m:t>
                </m:r>
                <m:f>
                  <m:fPr>
                    <m:type m:val="bar" />
                  </m:fPr>
                  <m:num>
                    <m:r>
                      <m:rPr>
                        <m:sty m:val="p" />
                      </m:rPr>
                      <m:t>ⅆ</m:t>
                    </m:r>
                    <m:r>
                      <m:t>y</m:t>
                    </m:r>
                  </m:num>
                  <m:den>
                    <m:r>
                      <m:rPr>
                        <m:sty m:val="p" />
                      </m:rPr>
                      <m:t>ⅆ</m:t>
                    </m:r>
                    <m:r>
                      <m:t>t</m:t>
                    </m:r>
                  </m:den>
                </m:f>
              </m:e>
            </m:d>
          </m:e>
          <m:e />
        </m:d>
      </m:den>
    </m:f>
    <m:r>
      <m:rPr>
        <m:nor />
        <m:sty m:val="p" />
      </m:rPr>
      <m:t> with some real math in it.</m:t>
    </m:r>
  </m:oMath>
</m:oMathPara>